Question

5. Taking the example of an element with atomic no. 16, explain how
electronic configuration of the atom of the element and relate the electronic
configuration to
its position in the Modern Periodic table and how valency of an element is
calculated on the basis of its atomic number?
Give complete answer ​

Answer 1

Atomic number of the element =16

Electronic configuration = 1s^2,2s^2,2p^6,3s^2,3p^4 Period number = Number of shells it

The atom of the element has three shells. So, the period number is 3.

The atom of the element has six valence electrons. So, the group number of the element will be 16 (6 + 10).

Valency = 8 - number of valence electrons (> 5) or number of valence electrons (<5)